It works really great.My docotor told me to use it daily two tablets atleast for 4yrs,when i was 13yrs old.Actually i didnot used it properly,even then it works for me.It doesnot have any side-effects.Now my ht is 5'10 inches.I would'nt have reached this,if i did'nt have used this product.so people who want to become tall use product before 18.